Set username in config/deploy.rb if it isn't the same as your local machine (config/deploy.rb.example provided)

From your local system (from the passenger-stack directory), run:

sprinkle -c -s config/install.rb

After you've waited for everything to run, you should have a provisioned slice.
Go forth and install your custom configurations, add vhosts and other VPS paraphernalia.

My app isn't running!?

No superfluous configuation is included, these scripts focus purely on slice installation.
Having said that passenger is configured to work with apache, your application should pretty much be a 'drop in' install.